| Delane Silva Roofing Company | Delane Francis Silva | — | (760) 880 2821 | Other roofers | Palm Desert · Riverside County | — | — |
| Delaney Construction Co INC | Mark Dean Delaney | — | (760) 801 6311 | GC, remodel, ADU | La Quinta · Riverside County | — | — |
| Delaney Fire Protection | Delaney Fire Protection | — | (714) 225 9726 | Other | Riverside · Riverside County | — | — |
| Delanos Building And Renovation | John Delano Linton | — | (951) 289 2903 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Delatorre Construction INC | Mario Ibarra De La Torre | — | (909) 214 4783 | GC, remodel, ADU | Lake Elsinore · Riverside County | — | — |
| Delcko Construction INC | Juan Carlos Lavalle | — | (760) 708 6090 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Delgadillo Electric INC | Ernesto Michael Iii Delgadillo | ernie@delgadilloelectric.com | (909) 342 2266 | Electricians | Jurupa Valley · Riverside County | — | — |
| Delgado's General Contracting Services | Delgado David | — | (951) 623 1329 | GC, remodel, ADU | Perris · Riverside County | — | — |
| Delgados Concrete Services LLC | Delgado David | delgadosconcreteservices@gmail.com | (951) 623 1329 | GC, remodel, ADU | Perris · Riverside County | — | — |
| Delion Electrical Contractors | Vernon Darnell Owens | — | (951) 414 7863 | Electricians | Winchester · Riverside County | — | — |
| Dell Ludwig DBA Cobra Drywall | Dell Ludwig DBA Cobra Drywall | — | (760) 774 6633 | Other | Palm Springs · Riverside County | — | — |
| Dell Mosley Plastering | Dell Mosley Plastering | — | (760) 323 2514 | Other | Palm Springs · Riverside County | — | — |
| Dellatorri General Engineering LLC | Efren Jesus Uribe | — | (951) 203 0487 | GC, remodel, ADU | San Jacinto · Riverside County | — | — |
| Dellsite Electric | Joshua Brian Dellsite | impallari@gmail.com | (808) 349 0779 | Electricians | Temecula · Riverside County | — | — |
| Delmaya Group LLC | Victor Manuel Garcia | — | (909) 336 8169 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Delmon Corporation DBA Aqua Bear Plumbing & Drain | Hameed Fadhil Al-Shawk | — | (760) 691 2327 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Delmuro General Contractors & Painting | Juan Jose Delmuro | — | (951) 933 8483 | GC, remodel, ADU | Moreno Valley · Riverside County | — | — |
| Delo Air | Joshua Aaron Deleon | — | (951) 683 3885 | HVAC | Riverside · Riverside County | — | — |
| Deloya's Masonry | Deloya's Masonry | — | (714) 914 6927 | Other | Riverside · Riverside County | — | — |
| Delta Building Solutions Corp | Jorge A Montes | — | (909) 600 0292 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Delta Engineering Construction Company | Jesus Arturo Camacho-tellez | — | (951) 992 6390 | Electricians | San Jacinto · Riverside County | — | — |
| Delta Pacific Contractor | Delta Pacific Contractor | — | (951) 496 5591 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Delta Pacific Contractors | Jacquelyn Ann Alexander | — | (951) 272 4673 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Delta Stoneworks Countertops | Salvador Ramos | — | (760) 898 5851 | Other | Coachella · Riverside County | — | — |
| Delta Three Electric LLC | Brandon Allen Bromley | — | (951) 205 4306 | Electricians | Winchester · Riverside County | — | — |
| Deluxe INC | Joseph Christopher Johnson | askbrand@deluxe.com | (951) 760 4609 | GC, remodel, ADU | Wildomar · Riverside County | — | — |
| Deluxe Pool Designs | Ricardo Damian | — | (760) 420 8938 | Pool | Temecula · Riverside County | — | — |
| Demetri Moreno | Demetri Moreno | — | (760) 275 3193 | GC, remodel, ADU | Cathedral City · Riverside County | — | — |
| Demo And Build Construction INC | Jessie Munoz | — | (951) 237 6467 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Demo Plus | Demo Plus | hello@demo-plus.com | (951) 377 1248 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Demo Pros Plus INC | Charles Michael Jr Merriss | — | (714) 605 1651 | Other | Eastvale · Riverside County | — | — |
| Demo Unlimited INC | Jeffrey Todd Curci | — | (760) 775 5884 | Other | La Quinta · Riverside County | — | — |
| Demolition Specialist INC | Jeremy Scott Thunderburk | — | (951) 737 2077 | Other | Corona · Riverside County | — | — |
| Dempsey Electric | David William Dempsey | — | (951) 660 3104 | Electricians | Riverside · Riverside County | — | — |
| Denali Glass Door And Window Company | Deborah Jeanne Jordan | — | (714) 766 6490 | Windows, patio, painters | Norco · Riverside County | — | — |
| Denali National Construction Company INC | Victor Manuel Santiago-Puga | — | (949) 942 7964 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Denali Water Solutions LLC | Omar Hilario Espinoza | — | (760) 398 0815 | GC, remodel, ADU | Coachella · Riverside County | — | — |
| Denergy Solutions | Denergy Solutions | — | (951) 306 9672 | Electricians | San Jacinto · Riverside County | — | — |
| Deniz Fence INC | Ochoa Angel Deniz | — | (951) 292 3548 | Other | Moreno Valley · Riverside County | — | — |
| Dennis Cardwell General Contractor | Dennis Cardwell General Contractor | — | (714) 425 5833 | GC, remodel, ADU | Menifee · Riverside County | — | — |